Flue-welding machine.



K. MATHEUS. BLUE WELDING MACHINE. APPLICATION IILED JULY 21. 1908.

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, K. MATHEUS. FLUB'WELDING MACHINE.

APPLIOATION FILED JULY 21, 190s.r

937,083, Patented Oct. 19,1909. 2 SHEETS-SHEET 2.

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is connected with the L lever 36, above the pivotal mounting thereof, by means of a link 43.

The tubular shaft surrounds a mandrel supporting member 44 provided, in its forward end, with a tapered hole 45 adapted to receive the tapered end 46 of a mandrel 47. The mandrel is provided with an enlarged head 48 adapted to be clamped to the end of the mandrel by means of a bolt 49 entered through a washer 50, the construction being one whereby heads of different sizes can be used in connection with the same mandrel shank or stem. The tapered inner end of the mandrel shank abuts against a cross wall 5l which has entered therethrough the forward end of a rod 52, which is adapted to be threaded into the end `of the mandrel shank. The outer end of the rod is entered through the rear wall 53 'of the mandrel supporting member' and has threaded thereon a nut 54 which serves to hold the rod in position. The mandrel supporting member, at its rear end, outside of the tubular shaft, is provided with a base lug 55 which is bolted onto the top of the base 6 and is of suitable size to rigidly hold the, mandrel supporting member in position within the tubular shaft and out of Contact therewith without the provision of other means of support. The forward end of the mandrel supporting member is provided with a flange 56 through the sides of which are' entered a pair of guide rods 57 which carry, at their forward ends, a stop collar 58 adapted to furnish an abutment for the inner end of the short tube or flue section. The rear ends of the rods 57 are entered through the sides 59 of the base lug 55 and V are adapted to be held in adjusted position by means of set screws 60, as shown in Fig. 2. Y In use, 'the machine will be driven from `the pulley or belt wheel 9, which rotates the tubular shaft carrying the fly wheel l0 and the slidable collar 29. The stop collar 58 will be adjusted to a suitable position to receive the short inner tube or iue section `which will be, positioned at its end, inside vof the rollers and resting upon the surface of the mandrel head 5S. The companion tube or flue section may then be positioned on the mandrel'head, after which a movement of the foot lever will forwardly project the sliding collar, which movement of -`the collar will actuate the links 27 and simultaneously swingall of the mutilated pinions in the proper direction, to inwardly project the slide plates toward the iiue. This gives a direct straight line movement to each 'of the slide plates, and causes all three of the rollers to simultaneously and uniformly Contact the surface to be welded. The method of mounting the tubular shaft andthe mandrel supporting member is one which gives great compactness and stability to the machine, and enables a heavy pressure to be applied to the welding rollers which are so mounted as to prevent any deflection from their true position. lhen it is desired to crimp the end of the tube o1` flue preparatory to the welding operation, the rollers can be removed and crimping plates 61, having concave crimping ends 62, substituted therefor. The crimping` plates are provided with slots 63 adapted to receive the bolts 20, as shown in Fig. 5. The plates are of proper size to contact the tube or Hue around its entire surface, and the crimping operation is performed in the man ner heretofore described, save only that the machine is not rotated during the crimping operation.

that I regard as new and desire to secure by Letters Patent is:

l. In a welding machine, a rotatably mounted head, means for revolving the head, a plurality of welding rollers slidably mounted on the head, racks connected with the rollers, gears meshing with the racks, and means for actuating the gears, substantially as described.

2. In a welding machine, the combination of a head rotatably mounted, plates slidably mounted on the head and adapted to have a radial movement, welding rollers mounted on the plates, racks connected with the plates, gears in mesh with the racks, and

means for imparting movement to the gears, substantially as described.

3. In a welding machine, the combination of a head rotatably mounted, plates slidably mounted on the head and adapted to have a radial'movement, welding rollers mounted on the plates, racks connected with the plates, gears in mesh with the racks, links connected with the gears, a sliding collar to which the links are pivoted, and means for imparting a sliding movement to the collar, substantially as described.

In a welding machine, the combination of a tubular shaft, a journal mounting for the shaft, a head on the shaft, slide plates mounted on the head and adapted to have a radial movement, members carried by the plates and adapted to engage a tube or Hue, 'i

racks connected with said plates, gears in mesh with said racks, and means for actuating said gears, substantially as described.

5. In a welding machine, the combination of a tubular shaft provided with a head, plates slidably mounted on said head and adapted to have a radial movement, members carried by said plates, racks on said plates, gears meshing with said racks, and

means for actuating said gears, substantially as described.

6. In a welding machine, the combination of a tubular shaft provided with a head, plates slidably mounted on said head and adapted to have a radial movement, members carried by said plates, racks on said plates, gears meshing with said'racks, a collar slidably mounted on the tubular shaft, connections between said collar and gears for actuating the latter by a movement of the former, and means forY imparting a sliding movement to said collar, substantially as described.

7. In a machine of the class described, the combination of a rotatably mounted head, a slide plate carried by said head, a member carried by said slide plate, a rack on said slide plate, a gear in mesh with said rack, and means for actuating said gear, substantially as described.

8. In a Welding machine, the combination of a tubular shaft open at its end, a journal mounting for said shaft, a mandrel socket projecting into the open end of said shaft, a rigid mounting for said mandrel socket, a mandrel enteredA into said socket, a stop collar surrounding said mandrel, rods supporting said stop collar and adjustably carried by said mandrel socket, members connected with the tubular shaft and adapted to co-act with the mandrel, and means for imparting to said members a radial movement with respect to the mandrel, substantially as de- Witnesses:

WALKER BANNING, PInRsoN l/V. BANNING. 

